Twana Krauhs: She's a true little girl, but yet she doesn't let her tomboy older sister and little brother go off without her. Jennifer Mathews: So when this bundle of energy struggled to breathe, John and Twana knew something was wrong. Twana Krauhs: It was very scary, very, very scary. They're like, no, don't leave her at all in this room by herself, even to go to the bathroom. Jennifer Mathews: Amy had pneumonia from an antibiotic-resistant bacteria. Doctors turned to a new medication. Dr. Sheldon L. Kaplan: It's the first new class of antibiotics that's been approved for use by the FDA in perhaps ten years or so. Jennifer Mathews: Studies show Linezolid is as effective as gold standard medications but works on a different side on the bacteria, making it effective against antibiotic-resistant bacteria. Dr. Kaplan says as antibiotics are used unnecessarily, bacteria build up a resistance to drugs. Dr. Sheldon Kaplan: We need newer antibiotics to address these resistance problems, which I think are just going to continue to increase. Jennifer Mathews: Twana is thankful the medication worked when Amy needed it. Twana Krauhs: She's too young, too valuable a little life to take that chance on. Jennifer Mathews: This is Jennifer Mathews reporting.